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Inventories (Tables)
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Components of Inventory

Inventories consist of the following (in thousands):

 

 

 

March 31, 2019

 

 

December 31, 2018

 

Raw materials

 

$

1,381

 

 

$

1,337

 

Work-in-process

 

 

1,585

 

 

 

1,605

 

Finished goods

 

 

754

 

 

 

655

 

Total inventory

 

$

3,720

 

 

$

3,597